Wool disazo dyestuffs and a process of making same.



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'* Toall whom it may concern:

Beit known that We, EUGEN ANDERWER'r and H IN ICH Sonoenri,'b th citizens of the -Swiss -Republic, and residentsof Basel, Switzerland, have invented/new and useful 1-;Wo01' Disazo Dyestuifs and a' Pro'cess of Making Same,-of which the following-is. a full, clear, and exact specification, a

We havefound that by combining. the,

tetrazo derivativeof fa 'i3-3-dia1ninod-iaryl'- one is a molecule of a naphth'olsulfonic acid new disazo dyestufi are obtained which 'dye- WOOl very pure tints fast to light and to}. fullingJ As. 8-3'-diaminodiarylmethan "compound may be employed advantageously the 3e3"-diamino-4- l-dimethyldiphenylmethan, the 3- 3"-dianiinodiphenylmethan and their derivatives.

I The invention is .illustrated by the follow-I ing examples:

- Example 1 $22.6 kg. of 3 3' diamino l-" dimethyldiphenylmethan are, dissolved; in 60 kg. hydrochloric acid 'andtetratotized at about CL With-a solntionfof M.2hg.*so-

- dium nitrite. The 'resultingsolution of'tet ram compound .zis poured, jwhilefi tirring, into a. solution of 52 kg. l i-naphtholsulfomc acid and of ackg; sodiunrcarbonate. lfter standing "for "a long time, the "mass ils heated at (3., and the dyestnfi salted out with common salt, filtered ofiypressed and .dried. It constitutes a red powder, which dissolves in water and in concentrated sulfuric acid w th a red-"coloration and dyes Wool in an Mild bath, Very pure red tints possessing'a' Very good fastness to Washing and to light.

Example; 2

l-naphtholsulfonic acid the f 2-6-naphtholsulfonic acid, the resulting dyestuif dissolves in Water and concentrated sulfuric acid to a, yellow-red solution and dyes Wool in an acid bath very pure yellow-red tints of a good fastness to Washing and to light.

. Example 3: The tetrazocompound prepared according to Example 1 is poured,

While stirring, into a solution of- 34.8 kg. 2-naphthol-3-6-disulfonicacid and of 50 kg. ofsodium acetate, at about 0 C. After stirring for about 2 hours the intermediate product is achieved and poured into a solution of 1'5 lxg'of bet-anaphthol, 13 kg. of soda By substituting in the Exam pie 1 for the; l same quail-t t lye. of 30 per cent. and'50-rk bonate. After stirring-foraiilong tiineithe combination is achieved and the? dyestuifiso lated according 'to the usual iifanneri 1 i It .-(l1SSOlV.B S in water and concentratedsulfuric of sodiuma'caracid ,to red solutions and'fdyes woolihan acid bath pure scarlet-red tints of ii good fastness to fulli'ng and to dight.

Example- 4; The solution-of tetrazo co1n'- pound derived from 22.6 kg: of 3 3 diam1- inc 4: 4J-dimethyldiphenylrn ethan accordii ing to Example 1 is mixed \riththe solution 5-py'razolone and of 50kg. of? crystallized sodium acetate. After formationwoftheiintermediate product,.that is-to.sa'y after about 2 hours, the mass is poured =into-a solution of 26 kg. of 1-l-naphtholsul'fonic acid and 50. kg; of sodium carbonate! 'The combination being effected,- the dyestuif is isolated,

1n the'usual manner. It dissolves in water and concentrated sulfuric acidito'.-orange so.-

,lutions' and dyes wool in anllacid bath"redorange tints fast to washingiandito lighti- Instead of the .a similar success. the 1 phenyl-3 inethyl-5- pyrozolone itself or its nitro -or c'arboxyl derivatives," the acetoacetanilid, 1 them'ethylke olg etca BIKES.

nylmethfan are tetrazotized with 60 kg. of

concentrated hydrochloric acid and 14.2 kg.

of sodium nitrite. -The resulting tetrazo compound is poured while stirring into a solution of 52 kg. of ll-naphtholsulfonic acid and of 50 kg. of-sodium carbonate. After some hours, the dyestuif is separated by heating-to 30 C., salted out, filtered off,

pressed and dried. It constitutes a. red powder dissolving in water and concent-rated sulfuric acid to red solutions. It

dyes WOOl in an acid bath pure scarlet-red tints light.

Example 6: By substituting for thellof a good fastness tofulling and to naphtholsulfonic acid employed in Example methyl-5--pyrazolone can ibe w-employed with -1; :2

. A 2 l L- ple-5: 19.8kg. of 3-3'-diamino-diphe- I kg of sodium acetate. Tlle intermediateproduct formed after several hours is poured. into a solution of 15 kg..o'f betanaphthol, 13 kg. of. soda lye of 30 per cent. andg50 kg. of sodium carbonate. After 24 hours the dyestufl is isolated the usual mariner. It

dissolves in'weter and concentrated sulfuric acid to red solutions and dyes woolen. an acid bath'yelloW-red tints.

' ExampleIS The tetrazo solution derived from 19.8 kg. of 3-3"-diaminodiphenylmethan according to Example 5 is added 'to e, solution of..27,.6 kg. of.1-(4-sulf0-)phenyl 3- metl yl-5-pyra'zolone and 50 kg. of crystal lized sodium acetate, in order to form an intermediate product! After about l hour this letter is poured into a solution of 26 kg. of 1-4-napht-holsulfonic acid end'50 kg. of ,so-

dium carbonate. The dyestufi' is isoluted in the usual manner. It dissolves in water and in concentrated-sulfuric acid to orange solu-' tions and dyes iyool orange-red tints of good fastness t0 'fulling and to light.

ture of dis-azo dyestulls fast to light and to What We claim is: 1. The described process for the manufacfulling, consisting in combining one mole eule of the tetraz o derivative of e-3-3-d1- aminoclierylmethan compound with 2 mole -.Cl1lS. 0'l uzo dyestuil' components whereof at least one molecule is ainolecule of anaph tholsulfonic acid.

' 2-. The described. process for tlie manufacture of disay o dyestuffs fast to light and to fulling, consisting in combining one molecule of the tetra-Yo derivative of iiv 3-3'-diaminodiphenylmetliun with '2' molecules of azo .d'yestuif components whereof at least one .molecule is a molecule. of a neplitliolsul'fonic acid.

I bath light.

sesame 3. The-"described process for the menufec' ture of disezo dyestuffs fast toliglit and to fulling consisting in,coniliiniiig one mole cule'of the tetr'azo derivative of 33'-di'a'mlilo-44;-dimethyldiphenylmethan' with "molecules of. azodyestufi components Where of at'least one moleculefis' a molecule-of a naplitholsulfonic acid.

'41-. As new products the described disazoidyestufiisfast-to light and to falling, which derive from 1 molecule of a tetrazotized 3 3 diaminodierylmethan compound end2 molecules of azo dyestutl' .coufiponent s-whereof at least one molecule is u molecule life-nephinethyldiphenylmetlian and 2, molecules of, l--.l -naplitliolsulfonic' acid, which constitutes ar'ed powder soluble inwalter end in coucen tinted, sulfuric acid to red solutions and dyes Wool and other animal fibers in an acid pure redf tints fast to washing and to In Witness whereof we have hereunto signed our n:unes this 15th day of .March 1917, in the presence of two subscribing witnesses. EUG EN ANDERXVERT.

HEINRICH SCHOBEL. llitnesses':

" ANNA Annular, v Ammo Rmunn. 

